Logic Gate Simulator

Place gates on a canvas, wire them together, and watch voltage flow in real time. Logic Gate Simulator lets you build digital circuits from scratch using the fundamental components — AND, OR, NOT, XOR gates, LEDs, and clock signals — then toggle inputs and observe exactly what happens. It's hands-on in a way that textbook diagrams never quite are.

This is genuinely useful for students working through a computer architecture or electronics course, but it's just as approachable if you're simply curious how binary logic underlies every chip ever made. Start with a basic AND gate and a couple of input switches, or attempt a half-adder if you already know your way around a truth table. The open-source MIT-licensed codebase is available if you want to dig deeper. Browse more apps like this in education.

If numbers and graphs are more your thing, Graphing Calculator goes in a different direction but covers the same hands-on STEM territory. For Logic Gate Simulator itself, a larger screen is worth it — the wiring canvas gets crowded fast once you add more than a handful of gates, and tracing signal paths is much easier when each connection has room to read clearly.